Syringe.



PATENTED NOV. 1.3, 1906.

Inventors. H. GHUBB. SYRINGE.

APPLICATION FILED APR. 19. 1906 Wi me 9 se 5 Samuel H. Chubb.

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syringe and opened to afford ready entrance stream. To prevent the valvefrom becom- UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Application filed April 19, 1906. Serial No. 312.563.

To all whom it may concern.-

Be it known that I, SAMUEL H. CHUBB, a citizen of the United States ofAmerica, and a resident of the city, county, and State of New York, haveinvented certain new and useful Improvements in Syringes, of which thefollowing is a specification.

My invention relates particularly to the construction of the syringenozzle. This nozzle is formed in a valve which operates to close alarger opening into the syringe than is afforded by the nozzle, theopening being closed when liquid is being ejected from the for liquidwhen the syringe is being filled. This additional entrance is annularand surrounds the nozzle, whereby when warm liquids are drawn in theyare caused to warm the nozzle and will not be chilled bythe nozzle whenejected.

In the accompanying sheet of drawings, which forms a part of thisapplication, Figure 1 is alongitudinal section througha syringeembodying my invention. Fig. 2 is a transverse section through thenozzle on the line was.

The syringe A, which may be of any desired construction by which it iscaused to draw in and eject liquid by a change in volume, is providedwith a pipe B, which affords a comparatively large opening into thesyringe. A combined nozzle and valve consisting of a head it and stem fis arranged with the stem, which is smaller than the inside bore of thepipe, projecting through the pipe and the head arranged to seat againstthe inner end of the pipe when there is pressure within the syringe,whereby the contained liquid is permitted to pass from the syringe onlythrough the nozzle in a fine ing dislodged and falling into the cavityof the syringe, a suitable stop consisting of a nut I n is secured nearthe tip of the stem. -The exterior end of the pipe which opens into thesyringe is notched atlc it to afi'ord passage-ways for free entrance forthe liquid into the pipe when the stop is resting against the outer endof the pipe. The stem is materially smaller than the inside bore of thepipe, so as to leave a free annular passage-way for the passage ofliquid. It will be seen, therefore, that while the syringe is providedwith a nozzle through which liquid can pass in a fine stream and emptyslowly the operation of the valvepermi ts a rapid filling through theopening of an additional passage-way for the liquid through the notchesat the end of the pipe and into the syringe through the annular spacebetween the inner walls of the pipe and the valve-stem. Any sticking ofthe valvehead against its seat is readily overcome if theliquid-pressure is not sufficient by pressin the protruding end of thevalve-stem.

TV'hat I claim as new, and desire to secure by Letters Patent of theUnited States, is In a syringe, the combination of a pipe opening intothe syringe, a combined nozzle and valve comprising a valve-head and avalve-stem, the valve-stem extending through and projecting from thepipe, and a-suitable stop secured to the valve-stem near its tip andoperating to arrest the inward movement of the nozzle and valve, theparts being provided with passage-ways for free entrance of liquid intoand through the pipe and exterior to the valve-stem which are notobstructed by the stop, substantially as described.

Signed by me at New York city, New York, this 12th day of April, 1906.

SAMUEL H. CHUBB. Witnesses:

CHARLES S. MEAD, ERWIN S. OHRISTMAN.

Patented Nov. 13, 1906.

